I don't know many french songs translated in english, except the Brel songs sung by Scott Walker. But a lot of english and american songs were translated in french throughout the 60's & 70's. i'm aware that translation, especially versified translation, is a hard work but "If I Had a Hammer" by Claude François ("Si j'avais un marteau") or "Santy Anna" by Hugues Aufray ("Santiano") lost almost everything what make the originals tremendous songs.